Battery-screen



A. S. HALLIDIE.

(No Model.)

BATTERY SCREEN.

. Patented Sept. 11, 1883.-

NITED' STATES PATENT ()FFIcE.

ANDREW S. HALLIDIE, OF SAN FRANCISCO, CALIFORNIA.

BATTERY-SCREEN.

SPECIFICATION forming part of Letters Patent No. 284,735, datedSeptember 11, 1883. Application filed January 2, 1883. (N0 model.)

To all whom it may concern.-

' Be it known that I, ANDREW S. HALLIDIE, of the city and county of SanFrancisco, State of California, have invented an Improvement inBattery-Screens; and I herebydeclare the following to be a full, clear,and exact description thereof.

My invention relates to certain improvements in screens-such as areemployed in orecrushing millsto allow the pulp to pass through onlyafter it has attained a certain degree of fineness.

My invention consists in certain details of construction and combinationof devices, as hereinafter fully described and claimed.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure l is a View of my improved screen in astamp-battery mortar. Fig. 2 is a horizontal section of the screen,showing supportingrods. Fig. 3 is a view-of apart of the screenframe,showing the corrugated groove.

In the construction of my improved screen I employ woven wire, punchedmetal, or any other suitable screen material, and bendor corrugate thematerial into angular faces or flutings a a, as shown. Supporting rodsor bars I) b are fixed in the screen-frame, so as'to pass down in theangles of the corrugations and give any desired degree of stiffness. In0 order toretain these screens in position, they are fixed in frames 0,which are shaped to fit the openings inthe mortar in whichthescreens theangular or fluted faces a a, in combination with the frames 0, the rods1), fitting into the angles of the screen on opposite sides,-and the 5mortar, as set forth.

In witness whereof I hereunto set myhand.

ANDREWV S. HALLIDIE.

Witnesses:

S. H. NOURSE,

G. W. EMERsoN.

